-- Author: fruit.com.cn
-- 运营分类（与「类型」drama_category 是两个概念）：分类可自定义增删，并关联多部短剧
-- 幂等，仅提交文件，由发布流程执行

CREATE TABLE IF NOT EXISTS drama_classification (
  id         BIGINT PRIMARY KEY,
  name       VARCHAR(64) NOT NULL,
  sort       INTEGER     NOT NULL DEFAULT 0,
  status     SMALLINT    NOT NULL DEFAULT 1,
  created_at TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
  updated_at TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE UNIQUE INDEX IF NOT EXISTS uk_drama_classification_name ON drama_classification (name);
COMMENT ON TABLE drama_classification IS '运营分类；与短剧类型(drama_category)相互独立';

CREATE TABLE IF NOT EXISTS drama_classification_drama (
  id                BIGINT PRIMARY KEY,
  classification_id BIGINT NOT NULL,
  drama_id          BIGINT NOT NULL,
  created_at        TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP
);
CREATE UNIQUE INDEX IF NOT EXISTS uk_classification_drama
  ON drama_classification_drama (classification_id, drama_id);
CREATE INDEX IF NOT EXISTS idx_classification_drama_drama
  ON drama_classification_drama (drama_id);
COMMENT ON TABLE drama_classification_drama IS '分类与短剧的关联关系';

DROP TRIGGER IF EXISTS trg_drama_classification_updated_at ON drama_classification;
CREATE TRIGGER trg_drama_classification_updated_at
  BEFORE UPDATE ON drama_classification
  FOR EACH ROW EXECUTE FUNCTION set_updated_at();